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Difficulty: HardWireless Networking Standards and Technologies

A network architect is designing a wireless infrastructure upgrade for a high-density venue. The plan requires deploying dual-band 802.11ax (Wi-Fi 6) access points while maintaining backward compatibility for legacy 2.4 GHz IoT sensors and optimizing bandwidth for modern clients. Which of the following technical characteristics and configuration rules apply to this wireless deployment? (Select TWO.)

  1. Configuring the 2.4 GHz radio spectrum requires selecting non-overlapping channels 1, 6, and 11 to avoid adjacent-channel interference.Answer
  2. The 802.11ax standard operates on both the 2.4 GHz and 5 GHz frequency bands to improve overall efficiency compared to 802.11ac.Answer
  3. C
    Selecting adjacent channels 2, 6, and 10 in the 2.4 GHz spectrum ensures zero channel overlap for high-density access points.
  4. D
    The 802.11ac wireless standard should be enabled on the 2.4 GHz radio to deliver high-throughput connectivity to legacy IoT sensors.

Answer

The correct statements are that 2.4 GHz deployments must use non-overlapping channels 1, 6, and 11 to prevent adjacent-channel interference, and that 802.11ax operates natively across both 2.4 GHz and 5 GHz frequency bands.
The deployment requires applying proper 2.4 GHz channel planning and accurate 802.11 standard capabilities. Non-overlapping channels 1, 6, and 11 are essential in 2.4 GHz to prevent adjacent-channel interference. Furthermore, 802.11ax operates on both 2.4 GHz and 5 GHz bands, allowing high-density optimizations across both spectrums.

Step-by-Step Solution

1
Analyze the frequency band channel allocation rules for 2.4 GHz Wi-Fi.
In North America and standard regulatory domains, the 2.4 GHz spectrum contains 11 channels spaced 5 MHz apart. Because a standard Wi-Fi channel requires 20 MHz of bandwidth, only channels 1, 6, and 11 provide complete frequency separation without adjacent-channel overlap.
Preventing frequency collision between neighboring access points is mandatory for reliable wireless communication.
2
Evaluate the frequency band support of IEEE 802.11 wireless standards (802.11ac vs 802.11ax).
802.11ac (Wi-Fi 5) operates exclusively in the 5 GHz frequency band. In contrast, 802.11ax (Wi-Fi 6) was designed as a dual-band standard that operates on both 2.4 GHz and 5 GHz (and 6 GHz in Wi-Fi 6E).
Understanding standard-to-frequency mappings ensures accurate hardware configuration and legacy client compatibility.

Key Concept

802.11 Wireless Standards Frequency Capabilities and 2.4 GHz Non-Overlapping Channel Selection
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Topics

Wireless Networking Standards and Technologies

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